egllog.c revision f6e030f531f7292a373a7cd633e8af9f97726266 
1/**
2 * Logging facility for debug/info messages.
3 * _EGL_FATAL messages are printed to stderr
4 * The EGL_LOG_LEVEL var controls the output of other warning/info/debug msgs.
5 */
6
7
8#include <stdarg.h>
9#include <stdio.h>
10#include <stdlib.h>
11#include <string.h>
12#include "egllog.h"
13
14#define MAXSTRING 1000
15#define FALLBACK_LOG_LEVEL      _EGL_WARNING
16#define FALLBACK_LOG_LEVEL_STR  "warning"
17
18static EGLint ReportingLevel = -1;
19
20
21static void
22log_level_initialize(void)
23{
24   char *log_env = getenv("EGL_LOG_LEVEL");
25
26   if (log_env == NULL) {
27      ReportingLevel = FALLBACK_LOG_LEVEL;
28   }
29   else if (strcasecmp(log_env, "fatal") == 0) {
30      ReportingLevel = _EGL_FATAL;
31   }
32   else if (strcasecmp(log_env, "warning") == 0) {
33      ReportingLevel = _EGL_WARNING;
34   }
35   else if (strcasecmp(log_env, "info") == 0) {
36      ReportingLevel = _EGL_INFO;
37   }
38   else if (strcasecmp(log_env, "debug") == 0) {
39      ReportingLevel = _EGL_DEBUG;
40   }
41   else {
42      fprintf(stderr, "Unrecognized EGL_LOG_LEVEL environment variable value. "
43              "Expected one of \"fatal\", \"warning\", \"info\", \"debug\". "
44              "Got \"%s\". Falling back to \"%s\".\n",
45              log_env, FALLBACK_LOG_LEVEL_STR);
46      ReportingLevel = FALLBACK_LOG_LEVEL;
47   }
48}
49
50
51/**
52 * Log a message to stderr.
53 * \param level one of _EGL_FATAL, _EGL_WARNING, _EGL_INFO, _EGL_DEBUG.
54 */
55void
56_eglLog(EGLint level, const char *fmtStr, ...)
57{
58   va_list args;
59   char msg[MAXSTRING];
60   const char *levelStr;
61   static int log_level_initialized = 0;
62
63   if (!log_level_initialized) {
64      log_level_initialize();
65      log_level_initialized = 1;
66   }
67
68   if (level <= ReportingLevel) {
69      switch (level) {
70      case _EGL_FATAL:
71         levelStr = "Fatal";
72         break;
73      case _EGL_WARNING:
74         levelStr = "Warning";
75         break;
76      case _EGL_INFO:
77         levelStr = "Info";
78         break;
79      case _EGL_DEBUG:
80         levelStr = "Debug";
81         break;
82      default:
83         levelStr = "";
84      }
85
86      va_start(args, fmtStr);
87      vsnprintf(msg, MAXSTRING, fmtStr, args);
88      va_end(args);
89
90      fprintf(stderr, "libEGL %s: %s\n", levelStr, msg);
91
92      if (level == _EGL_FATAL) {
93         exit(1); /* or abort()? */
94      }
95   }
96}
97